Google's announcement today mentions API support and a bid simulator as upcoming features, which will also be included in Shopping Campaigns. Although no longer in beta, I would anticipate Google will continue to update Shopping Campaigns based on advertiser feedback and increased functionality.

Author bio:

Mary Weinstein is the Director of Content at CPC Strategy. Mary is an e-commerce nerd and an expert in paid search, Google Shopping, content marketing and all things online marketing. You can reach out to Mary on Twitter.